The Respiratory System

Front

Tiny air sacs in the lungs that are the site for gas exchange. Oxygen is exchanged for Carbon Dioxide by the process of diffusion.

Back

Alveoli

Front

Tiny blood vessels that receive oxygen from the lungs (alveoli) and return carbon dioxide that is inhaled during respiration.

Back

Capillary

Front

Dome shaped muscle at the base of the lungs that pulls down when you inhale (contracts) and goes back to normal position (relaxes) when you exhale.

Back

Diaphragm

Front

Air enters, nose contains cilia.

Back

Nasal Passage/Mouth

Front

Passageway for food and air.

Back

Pharynx

Front

Vocal cords.

Back

Larynx

Front

Ciliated passageway for air made up of rings of cartilage.

Back

Trachea

Front

Branches towards each lung.

Back

Bronchi/Bronchial Tubes

Front

Smaller branches that extend into the lungs.

Back

Bronchioles

Front

Diaphragm contracts (pulls down), chest cavity expands, air pressure decreases and pulls air into the lungs, oxygen diffuses into the bloodstream.

Back

Inhalation